/* allen-research.com
   Shares its type and palette with blog.allen-research.com: Charter for text,
   the system sans for headings and labels, one blue for links. No scripts,
   no web fonts, no images in the chrome. */

:root {
  color-scheme: light dark;
  --bg: #fff;
  --text: #1f2328;
  --heading: #16191d;
  --muted: #57606a;
  --rule: #e4e6ea;
  --link: #0b5cad;
  --tint: #eef2f8;
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, Cambria, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --measure: 42rem;
  --gutter: 5.75rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111417;
    --text: #d5dae0;
    --heading: #f0f3f6;
    --muted: #9aa4af;
    --rule: #2a3037;
    --link: #7db7f5;
    --tint: #1a2330;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.65 var(--serif);
  text-rendering: optimizeLegibility;
}

a { color: var(--link); text-decoration-thickness: .06em; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: .12em; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; border-radius: 2px; }

img { max-width: 100%; height: auto; }

.skip {
  position: absolute; left: -999rem; top: 0;
  background: var(--bg); padding: .5rem .9rem; font: 600 .9rem var(--sans); z-index: 1;
}
.skip:focus { left: .5rem; top: .5rem; }

/* ---- Chrome ------------------------------------------------------------ */

.site-header, main, .site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem 1.5rem;
  padding-top: 1.6rem;
  padding-bottom: 1.1rem;
  font-family: var(--sans);
}
.site-name { font-weight: 700; font-size: 1.02rem; letter-spacing: -.01em; color: var(--heading); text-decoration: none; }
.site-header nav ul { display: flex; flex-wrap: wrap; gap: .2rem 1.35rem; list-style: none; margin: 0; padding: 0; }
.site-header nav a { font-size: .93rem; color: var(--muted); text-decoration: none; padding: .35rem 0; display: inline-block; }
.site-header nav a:hover { color: var(--heading); text-decoration: underline; }
.site-header nav a[aria-current="page"] { color: var(--heading); font-weight: 600; box-shadow: 0 2px 0 var(--heading); }

main { padding-top: 2.4rem; padding-bottom: 3.5rem; }

.site-footer {
  padding-bottom: 2.6rem;
  font: .84rem/1.6 var(--sans);
  color: var(--muted);
}
.site-footer::before { content: ""; display: block; border-top: 1px solid var(--rule); margin-bottom: 1.4rem; }
.site-footer p { margin: 0; }
.site-footer .links { margin: .1rem 0 .6rem; font-size: inherit; }
.site-footer a { color: inherit; }

/* ---- Type -------------------------------------------------------------- */

h1, h2, h3 { font-family: var(--sans); color: var(--heading); letter-spacing: -.012em; }
h1 { font-size: 2.3rem; line-height: 1.12; font-weight: 750; margin: 0 0 .6rem; }
h2 { font-size: 1.28rem; line-height: 1.25; font-weight: 700; margin: 3rem 0 .5rem; padding-bottom: .45rem; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.02rem; line-height: 1.35; font-weight: 650; margin: 0; letter-spacing: 0; }
p { margin: 0 0 1.05rem; }

.lede { color: var(--muted); font-size: 1.04rem; margin-bottom: 0; }
.more { font: .9rem var(--sans); margin: .9rem 0 0; }
.label { font: .82rem/1.5 var(--sans); color: var(--muted); }

.badge {
  display: inline-block; vertical-align: .08em; margin-left: .35rem;
  font: 600 .7rem/1 var(--sans); letter-spacing: .02em;
  color: var(--link); background: var(--tint); border-radius: 999px; padding: .28rem .55rem;
}

.links { display: flex; flex-wrap: wrap; gap: 0 1.1rem; list-style: none; margin: .2rem 0 0; padding: 0; font: .88rem var(--sans); }

/* ---- Home -------------------------------------------------------------- */

.intro { display: grid; grid-template-columns: 1fr 10.5rem; gap: 2.2rem; align-items: start; }
.intro .tagline { font: 1.02rem/1.4 var(--sans); color: var(--muted); margin: 0 0 1.3rem; text-wrap: balance; }
.intro img { display: block; width: 100%; border-radius: 6px; margin-top: .35rem; }
.intro .links { margin-top: .85rem; font-size: .93rem; }
.intro p:last-of-type { margin-bottom: 0; }

@media (max-width: 36rem) {
  .intro { grid-template-columns: 1fr; gap: 1.3rem; }
  .intro figure, .intro picture, .intro img { order: -1; }
  .intro img { width: 7.5rem; }
  h1 { font-size: 1.95rem; }
}

/* ---- Dated entries: publications, positions, talks ------------------- */

.entries { list-style: none; margin: 0; padding: 0; }
.entry {
  display: grid;
  grid-template-columns: var(--gutter) 1fr;
  column-gap: 1.1rem;
  padding: .72rem 0;
}
.entry + .entry { border-top: 1px solid var(--rule); }
.entry-when { font: .84rem/1.9 var(--sans); color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.entry-body { min-width: 0; font-size: .96rem; line-height: 1.55; }
.entry-body p { margin: .2rem 0 0; }
.entry-title { font: 650 1rem/1.4 var(--sans); color: var(--heading); margin: 0; }
.entry-title a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 30%, transparent); }
.entry-title a:hover { color: var(--link); text-decoration-color: currentColor; }
.entry-meta { color: var(--muted); }
.entry-org { font: 700 .8rem/1.5 var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--heading); margin: 0 0 .1rem; }
.entry .links { margin-top: .05rem; font-size: .84rem; }
.entry.continued { border-top: 0; padding-top: 0; }

@media (max-width: 36rem) {
  .entry { grid-template-columns: 1fr; }
  .entry-when { line-height: 1.5; }
}

/* ---- Software ---------------------------------------------------------- */

.project { padding: 1.9rem 0 .4rem; }
.project + .project { border-top: 1px solid var(--rule); }
.project h2 { border: 0; margin: 0; padding: 0; font-size: 1.5rem; }
.project .tagline { font: 1rem/1.45 var(--sans); color: var(--muted); margin: .25rem 0 1rem; }
.project .links { margin: -.3rem 0 1.1rem; font-size: .92rem; }
.project figure { margin: 0 0 1.3rem; }
.project figure img { display: block; border-radius: 4px; }
.project figure video { display: block; width: 100%; height: auto; border-radius: 6px; background: #16191d; }
figcaption { font: .82rem/1.5 var(--sans); color: var(--muted); margin-top: .5rem; }

/* ---- Contents line under a page title ---------------------------------- */

.toc { font: .9rem var(--sans); margin: .75rem 0 0; }
.toc ul { display: flex; flex-wrap: wrap; gap: .1rem 1.1rem; list-style: none; margin: 0; padding: 0; }

/* Small links still get a 24px touch target. */
.toc a, .links a { display: inline-block; padding: .28rem 0; }

/* ---- Print: the CV should print as a CV -------------------------------- */

@media print {
  :root { --bg: #fff; --text: #000; --heading: #000; --muted: #333; --rule: #bbb; --link: #000; }
  body { font-size: 10.5pt; }
  .site-header nav, .skip, .toc, .site-footer .links { display: none; }
  .site-header, main, .site-footer { max-width: none; padding-left: 0; padding-right: 0; }
  main { padding-top: 0; }
  a { text-decoration: none; }
  h2 { margin-top: 1.6rem; break-after: avoid; }
  .entry { break-inside: avoid; padding: .4rem 0; }
}